-->

Mechanical Properties Of Fluids

Question
CBSEENPH11018750

The audible range of human car is 20Hz - 20KHz. What is the corresponding wavelength range? (Speed of sound in air at ordinary temperature is 340 m/s)

Solution

Wavelength of the wave is given by,
                        space space lambda equals nu over straight v
Wavelength corresponding to frequency 20 Hz is, 
                        straight lambda subscript max equals 340 over 20 equals 17 straight m 
and
Wavelength corresponding to frequency 20KHz is, 
                     straight lambda subscript min equals fraction numerator 340 over denominator 20 comma 000 end fraction equals 0.017 straight m 
Wave length range of audible sound is 0.017m to 17m.